If our Universe were born a little differently, there wouldn’t have been any planets, stars, galaxies, or chemically interesting reactions. — 13.8 billion years ago, what we know today as our Universe began with the hot Big Bang. Filled with matter, antimatter and radiation in an almost uniform fashion, it expanded and gravitated in nearly perfect balance. As the Universe cooled, the matter and antimatter annihilated away, leaving a tiny, minuscule…